RFR: 8315072: Remove unneeded AdaptivePaddedAverage::operator new [v2]

[Kim Barrett]

> Please review this change to remove unneeded `operator new` definitions in
> AdaptivePaddedAverage.  See bug for more details.
> 
> Testing:
> mach5 tier1

Kim Barrett has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into gcutil-operator-new
 - remove unneded operator new in gcutils

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15439/files
  - new: https://git.openjdk.org/jdk/pull/15439/files/b7989311..4b76f624

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15439&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15439&range=00-01

  Stats: 10375 lines in 223 files changed: 6722 ins; 1901 del; 1752 mod
  Patch: https://git.openjdk.org/jdk/pull/15439.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15439/head:pull/15439

PR: https://git.openjdk.org/jdk/pull/15439